Apparatus for and process of generating foam.



1. B. L o. R. ERw|N./ APPARATUS FOR AND PROCESS YQEVGVEMRATING FOAM. APPLICATION FILE/D rs'llz. 1916.

15,214,660'. Patented Feb.6,191 7.

i, 'aimant Usbites JAMES IB. ERVIN AND ORLANDG R. ERWIN, 0F MIILWAU'KEE, 'i/"iSGSlN,

APPARATUS FR AND PROCESS OF GENERTIN-- Application filed February 1e, 1918.

To all whom may concern:

Be it known that we, JAMES B. ERWIN and ORLANDO R. ERwIN, citizens of the United States, residing in the city of Milwaukee, county of Milwaukee and State of lVisconsin, have invented new and useful Improvements in Apparatus for and Processes of Generating Foam, of which 'the folv lowing is a specification.

Our invention relates to improvements in apparatus for and process of generating foam for extinguishing lires, and it pertains to that class in which two foam producing' liquids are brought together and caused to chemically unite to form a lire extinguishing foam preparatory to being discharged upon a lire.

Our invention is explained by reference to the accompanying drawings, in which- Figure 1 represents a v'ertical .section` thereof in connection with an air pump, a side view of which is shown, by which air is compressed and used for forcing and discharging said fire extinguishing liquids upon a fire. Fig. 2' is a similar view to that shown in Fig. 1, part broken away showl ing a receptacle for compressed gas connected to said apparatus.

Like parts are identified by the same reference numerals throughout both views.

1 represents a liquid-tight receptacle of ordinary construction, and the same is provided with a. partition 2 which is prefen ably located substantially at the center of said'receptacle whereby the liquids 3 and 4 are separated from each other.

5 represents an air pump of ordinary construction by which air is compressed and forced therefrom through the duct 6 into the upper end 7 ot' said receptacle 1, whereby said liquids 3 and 4 are simultaneously forced upl through the ducts 8,1%*into the central duct 10 in which duct 10 they are commingled and converted into a foam, which foam is discharged through an outlet nozzle 11 upon the tire. r1`he central duct 10 is preferably made of larger area than the ducts 8, 8, whereby space is formed for generating the foam, as stated.

12 is a stufng nut which is employed for forcing the packing 13 in close contact with said discharge duct 10 and said receptacle 1` whereby the compressed air is prevented 'from escaping around said duct 10. 14 is a removable cap which is connected with the receptacle 1 by a screw threaded joint Patented 59 semi no. 7am.

15, whereby when said cap is removed said liquids 3 and 4 are readily inserted in the compartments 16 and 17 preparatory operating the device. 1t will, of course be understood that when said liquids 3 an' 4 have been put in place said cap-1 again connected with the receptacle Il, a shown. it will also be understood the lower end of the pump 5 is readily de tached from tl e lower end of said receptacle .i by removing the screw 18.

19 is a handle by which the extinguisher may be transported from one place to another.

While the pump 5 shown is adapted to discharge air with each upstroke of the han dle 20 it will bev understood that 'the construction ot said lpump may be varied as is well known to the art, whereby air may he forced into the receptacle 1 by a down stroke. lt will also be understood that said pump is provided with ordinary check valves, not shownl` whereby air which has been forced to the receptacle 1 is prevented from returning to the pump with either stroke of the piston.

It will be understood that ay receptacle. 21 containing compressed gas may e sub wir? -stituted for the pump 5, when by opening the valve 22 the gas will escape from said ,receptacle into said receptacle 1 through the duct 23, wherebyv said re 'extinguishing liquids 3 and 4 will be forced therefrom .as stated.

It will be seen that the partition 2 extends with its upper edge above the edge or" the receptacle 1 and within the cap 14 whereby the Huid 3 and 4 may assume levels above the upper edge of" the receptacle 1 and within the cap while 'the connections between the outlet ducts 10 and branch ducts 8 being within the cap 14 prevents any loss of fluid through leakage.

Having thus described our invention what we claim as new and desire to secure by Letters Patent, is:.-.

1. ln a device of thedescribed class the combination ot a liquid receptacle a partition subdividing said receptacle into two compartments, a cap tor said receptacle, two branch ducts communicating with each other within the said cap si-ibstantially centrally between the said cap and the upper edge of the said partition and respectively extending into/the said compartments, a central third /duct communicating with the said receptacle and cap, branch outlet pipes arranged Within the said chambers spanning the upper end of the said partition within the chamber of the cap, an enlarged outlet pipe connected to the said branch pipes and centrally extending through the said cap and Huid pressure producing means communicating with the said chambers through the said cap.

In testimony whereof we aflix our signatures in the presence of two witnesses.

JAMES B. ERVIN. ORLANDO R. ERWIN.

Witnesses:

IRMA D. BREMER, ALICE J. MCKrm l m N. 

